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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package org.apache.tools.ant.types.resources;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Iterator;
import java.util.List;
import org.apache.tools.ant.types.Resource;
/**
* ResourceCollection that contains the first <code>count</code> elements of
* another ResourceCollection, a la the UNIX head command.
* @since Ant 1.7
*/
public class First extends SizeLimitCollection {
/**
* Take the first <code>count</code> elements.
* @return a Collection of Resources.
*/
protected Collection<Resource> getCollection() {
int ct = getValidCount();
Iterator<Resource> iter = getResourceCollection().iterator();
List<Resource> al = new ArrayList<Resource>(ct);
for (int i = 0; i < ct && iter.hasNext(); i++) {
al.add(iter.next());
}
return al;
}
}
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